com.saxonica.ee.validate

Class SchemaElementTest

java.lang.Object

net.sf.saxon.pattern.NodeTest

com.saxonica.ee.validate.SchemaElementTest

All Implemented Interfaces:

SchemaNodeTest, ItemType

public class SchemaElementTest
extends NodeTest
implements SchemaNodeTest

A NodeTest of the form schema-element(element-name)

Since:

9.3

Author:

Michael H. Kay

Constructor Summary

Constructors

Constructor and Description
SchemaElementTest(ElementDecl element) Constructor

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object other)
SchemaType	getContentType() Get the content type allowed by this NodeTest (that is, the type annotation of the matched nodes).
double	getDefaultPriority() Determine the default priority of this node test when used on its own as a Pattern
ElementDecl	getElementDeclaration() Get the element declaration
int	getHeadFingerprint() Get the fingerprint of the head of the substitution group
int	getNodeKindMask() Get a mask indicating which kinds of nodes this NodeTest can match.
int	getPrimitiveType() Determine the types of nodes to which this pattern applies.
IntSet	getRequiredNodeNames() Get the set of node names allowed by this NodeTest.
UType	getUType() Get the corresponding UType.
int	hashCode() Returns a hash code value for the object.
boolean	isNillable() Determine whether nilled nodes can match this node test
boolean	isNillable(int fingerprint) Determine if nilled nodes named N can match this node test
boolean	matches(int nodeKind, NodeName name, SchemaType annotation) Test whether this node test is satisfied by a given node.
boolean	matches(TinyTree tree, int nodeNr) Test whether this node test is satisfied by a given node on a TinyTree.
static boolean	matchesAnnotation(SchemaType required, SchemaType actual) Determine whether the type annotation of an element or attribute instances matches the required type of the element or attribute declaration named in a schema-element() or schema-attribute() test
boolean	matchesNode(NodeInfo node) Test whether this node test is satisfied by a given node.
String	toString()
void	visitNamedSchemaComponents(SchemaComponentVisitor visitor) Visit all the schema components used in this ItemType definition

Methods inherited from class net.sf.saxon.pattern.NodeTest

copy, export, getAtomizedItemType, getFingerprint, getMatchingNodeName, getPrimitiveItemType, isAtomicType, isAtomizable, isPlainType, matches

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

SchemaElementTest

public SchemaElementTest(ElementDecl element)
                  throws MissingComponentException

Constructor

Parameters:

element - The element declaration of the named element

Throws:

MissingComponentException

Method Detail

getElementDeclaration

public ElementDecl getElementDeclaration()

Get the element declaration

Returns:

the element declaration that this schema-element relates to (the head of the substitution group)

getUType

public UType getUType()

Get the corresponding UType. A UType is a union of primitive item types.

Specified by:

getUType in interface ItemType

Returns:

the smallest UType that subsumes this item type

matches

public boolean matches(int nodeKind,
              NodeName name,
              SchemaType annotation)

Test whether this node test is satisfied by a given node. This method is only fully supported for a subset of NodeTests, because it doesn't provide all the information needed to evaluate all node tests. In particular (a) it can't be used to evaluate a node test of the form element(N,T) or schema-element(E) where it is necessary to know whether the node is nilled, and (b) it can't be used to evaluate a node test of the form document-node(element(X)). This in practice means that it is used (a) to evaluate the simple node tests found in the XPath 1.0 subset used in XML Schema, and (b) to evaluate node tests where the node kind is known to be an attribute.

Specified by:

matches in class NodeTest

Parameters:

nodeKind - The kind of node to be matched

name - identifies the expanded name of the node to be matched. The value should be null for a node with no name.

annotation - The actual content type of the node

Returns:

true if the node matches this node test

matches

public boolean matches(TinyTree tree,
              int nodeNr)

Test whether this node test is satisfied by a given node on a TinyTree. The node must be a document, element, text, comment, or processing instruction node. This method is provided so that when navigating a TinyTree a node can be rejected without actually instantiating a NodeInfo object.

Overrides:

matches in class NodeTest

Parameters:

tree - the TinyTree containing the node

nodeNr - the number of the node within the TinyTree

Returns:

true if the node matches the NodeTest, otherwise false

matchesNode

public boolean matchesNode(NodeInfo node)

Test whether this node test is satisfied by a given node. This alternative method is used in the case of nodes where calculating the fingerprint is expensive, for example DOM or JDOM nodes.

Overrides:

matchesNode in class NodeTest

Parameters:

node - the node to be matched

Returns:

true if the node test is satisfied by the supplied node, false otherwise

matchesAnnotation

public static boolean matchesAnnotation(SchemaType required,
                        SchemaType actual)

Determine whether the type annotation of an element or attribute instances matches the required type of the element or attribute declaration named in a schema-element() or schema-attribute() test

Parameters:

required - the required type of the declaration named in the schema-element() or schema-attribute test

actual - the actual type annotation of the instance

Returns:

true if there is a match, false otherwise

getDefaultPriority

public final double getDefaultPriority()

Determine the default priority of this node test when used on its own as a Pattern

Specified by:

getDefaultPriority in class NodeTest

Returns:

the default priority for the pattern

getPrimitiveType

public int getPrimitiveType()

Determine the types of nodes to which this pattern applies. Used for optimisation. For patterns that match nodes of several types, return Type.NODE

Specified by:

getPrimitiveType in interface ItemType

Overrides:

getPrimitiveType in class NodeTest

Returns:

the type of node matched by this pattern. e.g. Type.ELEMENT or Type.TEXT

getNodeKindMask

public int getNodeKindMask()

Get a mask indicating which kinds of nodes this NodeTest can match. This is a combination of bits: Type.ELEMENT for element nodes, Type.TEXT for text nodes, and so on.

Overrides:

getNodeKindMask in class NodeTest

Returns:

a combination of bits: 1<

getRequiredNodeNames

public IntSet getRequiredNodeNames()

Get the set of node names allowed by this NodeTest. This is returned as a set of Integer fingerprints. A null value indicates that all names are permitted (i.e. that there are no constraints on the node name. The default implementation returns null.

Overrides:

getRequiredNodeNames in class NodeTest

Returns:

the set of integer fingerprints of the node names that this node test can match.

getContentType

public SchemaType getContentType()

Get the content type allowed by this NodeTest (that is, the type annotation of the matched nodes). Return AnyType if there are no restrictions. The default implementation returns AnyType.

Overrides:

getContentType in class NodeTest

Returns:

the type annotation that all nodes matching this NodeTest must satisfy

isNillable

public boolean isNillable()

Determine whether nilled nodes can match this node test

Overrides:

isNillable in class NodeTest

Returns:

true if nilled nodes can match this node test

isNillable

public boolean isNillable(int fingerprint)

Determine if nilled nodes named N can match this node test

Parameters:

fingerprint - the element name

Returns:

true if nilled nodes with the given name can match the node test

getHeadFingerprint

public int getHeadFingerprint()

Get the fingerprint of the head of the substitution group

Returns:

the fingerprint of the head of the substitution group

visitNamedSchemaComponents

public void visitNamedSchemaComponents(SchemaComponentVisitor visitor)
                                throws XPathException

Visit all the schema components used in this ItemType definition

Specified by:

visitNamedSchemaComponents in interface ItemType

Overrides:

visitNamedSchemaComponents in class NodeTest

Parameters:

visitor - the visitor class to be called when each component is visited

Throws:

XPathException - if an error occurs

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Returns a hash code value for the object.

Overrides:

hashCode in class Object

equals

public boolean equals(Object other)

Overrides:

equals in class Object